OK I realise what is happening now :o.
There is a basic incompatibility between what bits a +VR recorder will write for the aspect ratio change, and what a +RW player will pick up and use from the video stream. This is because aspect ratio switching is NOT a feature of the DVD-Video standard (see the 'Aspect ratio' section of the sticky thread on 'The DVD+RW real-time video format', at the top of the Philips forum page here).
Aspect ratio change is implemented in Philips recorders, but in a different (and usually incompatible) way. I bet if you play your DVDR985 recordings back on the DVDR985 again, the aspect ratio switching will be correct. Perhaps it's a happy accident that your Malata player will recognise the non-standard a/r switch signals. My Yamada (not Yamaha) DVD player will too...
The only reliable way people have found to ensure true a/r switching with a DVD player and recordings made on a +RW DVD recorder, is to rip the recordings from the +RW with DVD Decrypter and reauthor them as a proper DVD-Video. In this way the a/r is reinstated in the DVD-Video IFO file and invariably works in any standalone player.
You can use DVD Patcher on the ripped MPEG2 file, or author to DVD folders on the PC HDD and change the a/r in the IFO file using IFOEdit.
Do you have a PC DVD writer and authoring software?