Second level in Table of contents does noet work correctly in ARIS 10.0.7

We created a report with a two-level TOC in ARIS 9.8. After importing in ARIS 10.0.7 the TOC is not correct.

9.8 shows

1. Section 1 ...........................................1

1.1 Section 1.a........................................2

1.2.Section 1.b........................................3

10.0.7 shows

1. Section 1 . ........................................1

2 ..........................................................2

2.1 Section 1.a ......................................3

2.2 Section 1.b ......................................4

How can we solve this problem?