Paul the Wolf
Former Score Predictions Comp Organiser (now out)
You probably know more about this than me, so feel free to correct.
But it does make sense splitting the parliamentary elections from the presidential. Maybe he feels there is a chance he could squeeze this result, or if the far right does win, then he is still president and can moderate their worst excesses especially in foreign policy etc and give them a couple of years to prove that they can not deliver, rather than limp on for two years and face a Tory style annihilation with a far right president and parliament.
EDIT: either way it's a big gamble
It's difficult to read. In the past , the parliament elections were held at a different time to the presidential so an incoming president could inherit a parliament made of the opposition being in the majority. The other significant parties like the left or the far-left or the greens or even the Tories as well as the centre parties are against the far-right.
Two other factors after this EU vote, turnout was low and there were so many candidates and parties (a lot who had changed their name) it must have been difficult for the average voter to follow. If they were protesting against Macron the well known name was Bardella. Who knows.