Releasing Purchase reqs

Hello SAP Gurus,

I am experiencing difficulties with two requisitions which appear to be blocked and cannot be released for creation of a purchase order.

A user signed them off but I think she has gone in at the wrong level as this happened with other requisitions.

Now another user has tried to sign them off but is unable to do so. What could be happening is there anyway to release them?

Went into ME52N and all I can see in the status tab is not blocked and in the release strategy tab it shows blocked approval required.

Can you please advice?

Thanks