I have a different answer.
Look at the notes on the back of your tax codings. They will tell you how much the tax underpayments are that you put into each of the boxes, if at all. You may find that the 2014/15 coding restriction has nothing to do with 2013/14 in which case you should ignore it. It may be that the underpayment restriction in your 2014/15 tax code is to cover an underpayment /13 in which case you would deal with that in your 2015 tax return.
If you cannot locate the tax coding notes, call the tax office and ask them to tell you what the correct figures are 7 and 8 of the SA110 pages. You don't put £3,636 or £3,384 in any box. They are the restrictions of allowances that are necessary to collect the underpaid tax. So, if you owed £500 and you were a 20% taxpayer, the restriction would be £2,500 (£2,500 x 20% =£500).
I'm afraid that if you have submitted your return, you are likely to get an excessive tax demand before HMRC spot the mistake and you should either amend your return or call the tax office when you can see that the return has been processed.
The article here explains how the allowance restriction works.
I hope this helps but let me know if you have any further questions.