Phantom Row Insert After Insert Error..... Please Help!!

I have a sp that when executed inserts data into two tables(shown below).  The sp works fine when the correct information is inserted into the tables but when you try and insert data that breaks the constraints in the table it obviously errors, but it seems to inert a new row in to the tmptimesheet table(error message shown below).  When you open the tmptimesheet table there isn’t the row of a data there but if you run this (SELECT IDENT_CURRENT('tmptimmesheets') after the error it will come back with a id one higher than what’s in the table. Then the next time you run the sp a record will be inserted into the tmptimesheet table and not in to the tmptimsheethours table!?   I’m at a total lost at what to do can someone please help!?
 
  CREATE TABLE [dbo].[tmptimesheets](
[TimesheetID] [int] IDENTITY(1,1) NOT NULL,
[Placementid] [int] NOT NULL,
[Periodstarting] [datetime] NOT NULL,
[createdon] [datetime] NOT NULL,
[createduserid] [int] NOT NULL,
[Issued] [nchar](1) COLLATE Latin1_General_CI_AS NOT NULL,
[ReadyForBilling] [nchar](1) COLLATE Latin1_General_CI_AS NOT NULL,
[Reject] [nchar](1) COLLATE Latin1_General_CI_AS NULL,
[Comments] [text] COLLATE Latin1_General_CI_AS NULL,
[Rate] [nchar](1) COLLATE Latin1_General_CI_AS NOT NULL,
CONSTRAINT [PK_tmptimesheets] PRIMARY KEY CLUSTERED
(
[TimesheetID] ASC
)WITH (IGNORE_DUP_KEY = OFF) ON [PRIMARY],
CONSTRAINT [IX_tmptimesheets_1] UNIQUE NONCLUSTERED
(
[Placementid] ASC,
[Periodstarting] ASC
)WITH (IGNORE_DUP_KEY = OFF) ON [PRIMARY]
) ON [PRIMARY] TEXTIMAGE_ON [PRIMARY]


CREATE TABLE [dbo].[tmptimesheethours](
[TmpTimesheethourid] [int] IDENTITY(1,1) NOT NULL,
[Timesheetid] [int] NOT NULL,
[applicantid] [int] NOT NULL,
[Workedon] [datetime] NOT NULL,
[Hoursworked] [numeric](10, 2) NOT NULL,
[performancevalueid] [int] NOT NULL,
[Reject] [ntext] COLLATE Latin1_General_CI_AS NULL,
[Breaks] [numeric](10, 2) NOT NULL,
CONSTRAINT [PK_tmptimesheethours] PRIMARY KEY CLUSTERED
(
[TmpTimesheethourid] ASC
)WITH (IGNORE_DUP_KEY = OFF) ON [PRIMARY]
) ON [PRIMARY] TEXTIMAGE_ON [PRIMARY]

GO
USE [Pronet_TS]
GO
ALTER TABLE [dbo].[tmptimesheethours] WITH NOCHECK ADD CONSTRAINT [FK_TimesheetHours_Timesheets] FOREIGN KEY([Timesheetid])
REFERENCES [dbo].[tmptimesheets] ([TimesheetID])
GO
ALTER TABLE [dbo].[tmptimesheethours] CHECK CONSTRAINT [FK_TimesheetHours_Timesheets]

Error Message
Msg 2627, Level 14, State 1, Procedure sp_tmptimesheet_insert_day, Line 40
Violation of UNIQUE KEY constraint 'IX_tmptimesheets_1'. Cannot insert duplicate key in object 'dbo.tmptimesheets'.
The statement has been terminated.
Msg 547, Level 16, State 0, Procedure sp_tmptimesheet_insert_day, Line 65
The INSERT statement conflicted with the FOREIGN KEY constraint "FK_TimesheetHours_Timesheets". The conflict occurred in database "Pronet_TS", table "dbo.tmptimesheets", column 'TimesheetID'.
The statement has been terminated.
Msg 547, Level 16, State 0, Procedure sp_tmptimesheet_insert_day, Line 86
The INSERT statement conflicted with the FOREIGN KEY constraint "FK_TimesheetHours_Timesheets". The conflict occurred in database "Pronet_TS", table "dbo.tmptimesheets", column 'TimesheetID'.
The statement has been terminated.
Msg 547, Level 16, State 0, Procedure sp_tmptimesheet_insert_day, Line 108
The INSERT statement conflicted with the FOREIGN KEY constraint "FK_TimesheetHours_Timesheets". The conflict occurred in database "Pronet_TS", table "dbo.tmptimesheets", column 'TimesheetID'.
The statement has been terminated.
Msg 547, Level 16, State 0, Procedure sp_tmptimesheet_insert_day, Line 130
The INSERT statement conflicted with the FOREIGN KEY constraint "FK_TimesheetHours_Timesheets". The conflict occurred in database "Pronet_TS", table "dbo.tmptimesheets", column 'TimesheetID'.
The statement has been terminated.
Msg 547, Level 16, State 0, Procedure sp_tmptimesheet_insert_day, Line 153
The INSERT statement conflicted with the FOREIGN KEY constraint "FK_TimesheetHours_Timesheets". The conflict occurred in database "Pronet_TS", table "dbo.tmptimesheets", column 'TimesheetID'.
The statement has been terminated.
Msg 547, Level 16, State 0, Procedure sp_tmptimesheet_insert_day, Line 178
The INSERT statement conflicted with the FOREIGN KEY constraint "FK_TimesheetHours_Timesheets". The conflict occurred in database "Pronet_TS", table "dbo.tmptimesheets", column 'TimesheetID'.
The statement has been terminated.
Msg 547, Level 16, State 0, Procedure sp_tmptimesheet_insert_day, Line 200
The INSERT statement conflicted with the FOREIGN KEY constraint "FK_TimesheetHours_Timesheets". The conflict occurred in database "Pronet_TS", table "dbo.tmptimesheets", column 'TimesheetID'.
The statement has been terminated.
Msg 3902, Level 16, State 1, Procedure sp_tmptimesheet_insert_day, Line 223
The COMMIT TRANSACTION request has no corresponding BEGIN TRANSACTION.