Jobseekers Benefit isn't means tested so, regardless of your partner's income, you can get €203 if your 2018 income equates to €300+/week or a reduced rate if not. Jobseekers Allowance is means tested so you probably won't get a lot, if anything, if your partner or others in your household are earning.
But that's not what you're getting at. Your concern may (or may not) be overly prudent. They did say at the outset that if your regular dole works out higher than the €350 the balance would be paid and backdated. They gave the impression that there would/will be no balancing where your regular dole is less than PUP. However, at the outset PUP was backdated, that stopped quite sharpish once the bean counters weighed so... In short, your guess is as good as mine but I'd take a less prudent view and assume that if they do seek repayments they won't pursue them with sufficient tenacity to get anything unless you have a future claim from which they can apply the "usual" (up to 15%) deduction.