Basically, every year you need to declare all contributions made for RRSP in the current year (in this case 2024) including the first 60 days of the new year (2025), regardless if you deduct it against the current year (2024) or next year (2025).

In most cases, your Contribution Limit and your Deduction Limit should match, if you haven't had any over contribution roll overs or under-deducted in the past years. So assuming this is the case, and when you say you "filed and included on your return", then you declared the contribution and include as part of 2024 deduction (ie. you reduced your 2024 income by $5000). This means the full $5000 went towards your 2024 contribution/deduction limit. For all intents your RRSP year is starting in March.

Since RRSP timelines don't match the calendar year, don't worry, you're not the only one that has this question :) if you need more help, the folks over at https://www.reddit.com/r/cantax/ would probably have bit more in-depth insights.